1908. First report on the economic features of turtles of Pennsylvania. Zool. Bull. Div. Zool. Pennsylvania St. Dep't. Agric., 6(4-5):105-96.
Swanson, P. L.
1939. Herpetological notes from Indiana. Amer. Midl. Nat., 22(3):684-95, November.
1952. The reptiles of Venango County, Pennsylvania. Amer. Midl. Nat., 47(1):161-82, 1 fig., January.
Taylor, E. H.
1920. Philippine turtles. Philippine Jour. Sci., 16(2):111-44, 7 pls.
1933. Observations on the courtship of turtles. Univ. Kansas Sci. Bull., 21(9):269-71, March 15.
1935. Arkansas amphibians and reptiles in the Kansas University Museum. Univ. Kansas Sci. Bull., 22(10):207-18, April 15.
Telford, S. R., Jr.